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Local animals in this group:



What do they look like?

Adults: adult mosquitos are slender true flies, usually less than 1 cm long. They have long thin legs and wings. Some other true flies look like mosquitos, but only mosquitos have the long thin mouthparts called a proboscis. Adult mosquitos have long antennae, and male mosquitos antennae look very feathery. Like all true flies, mosquitos only have two wings. Their bodies and wings are covered with microscopic scales.

  • Range length
    0.2 to 1.0 cm
    0.08 to 0.39 in

Where do they live?

There are mosquitos all over the world, anywhere there is fresh water for their larvae. There are over 2,500 species of mosquitos in the world, and about 200 of them are found in North America.

What kind of habitat do they need?

Mosquitoes need still freshwater or slightly salty water for their larvae to grow, but different species have evolved to use all different kinds of water. Some grow in ponds, some in puddles, some in tree holes, some in swamps, some in salmarshes. They are most common and diverse in humid habitats but some can even be found in the arctic tundra, active during the brief summer.

  • Aquatic Biomes
  • lakes and ponds
  • rivers and streams
  • coastal

How do they grow?

Mosquitos hatch from eggs, and they start out as swimming larva. They feed and grow, then transform into a pupa. The pupa is also aquatic. The pupa doesn't grow, it's a resting stage while the mosquito transform into the adult stage. The adult is the flying stage that has legs and wings and can bite.

How long do they live?

Most mosquitos only live for a year or so, and spend most of their lives as aquatic larvae. The adults usually only survive for a few weeks, but in some species the adults survive the winter, and the larval stage is short.

How do they behave?

Some mosquitos are active during daylight, some at night. They don't have territories, but may stay near a body of water where they can lay eggs. They are solitary animals, and come together only to mate. However, you may sometimes see clouds of thousands or millions of mosquitos. This is because they produce many offspring and need certain kinds of habitats. Because so many mosquitos are in the same area, they appear as clouds.

How do they communicate with each other?

Mosquitos find each other by scent and by the sound of their wing vibrations when they fly. When looking for animals to bite, they can also sense heat, moisture in the air, and the breath of animals.

What do they eat?

Mosquitoes only feed when they are larvae and adults. Adults drink nectar from flowers for energy. Only the females bite vertebrates, such as mammals, birds, reptiles, and amphibians and feed on blood. Some species specialize in certain groups, like birds or frogs, and others will bite whatever vertebrate they can find.

The larvae of most mosquito species filter algae and bits of dead plants and animals from the water. A few species are predators on other aquatic insects, including other mosquito larvae.

What eats them and how do they avoid being eaten?

The aquatic stages of mosquitoes float without moving as much as the can, trying to look like bits of debris. They will wriggle and swim away from danger if they have to. Adults can fly quickly and try to dodge away from danger as best they can. They often try to bite at night or dusk so they are hard to see. Scientists think this may be to avoid overheating, not to avoid predators.

What roles do they have in the ecosystem?

Mosquitos play a big role in the ecosystem because they carry diseases. Many disease-causing organisms catch rides on mosquitos, going from host to host. Mosquitos have a smaller role as pollinators of flower.

  • Ecosystem Impact
  • pollinates

Do they cause problems?

World-wide, mosquitos probably cause more harm to humans than any other group of insects, because they carry so many deadly diseases. They carry diseases of humans and diseases of domesticated animals like dogs, cats, horses, and cattle.

How do they interact with us?

Mosquitos help pollinate some flowers. They are important food for lots of other animals too.

Are they endangered?

No mosquitos are considered endangered. Many governments and research groups are trying to find ways to reduce the populations of mosquitos.

  • IUCN Red List [Link]
    Not Evaluated

Some more information...

When mosquitos bite, they inject some chemicals that help keep the blood from clotting. The bite itches because our bodies are reacting to these chemicals.



Living in Australia, New Zealand, Tasmania, New Guinea and associated islands.

World Map


living in sub-Saharan Africa (south of 30 degrees north) and Madagascar.

World Map


living in the Nearctic biogeographic province, the northern part of the New World. This includes Greenland, the Canadian Arctic islands, and all of the North American as far south as the highlands of central Mexico.

World Map


living in the southern part of the New World. In other words, Central and South America.

World Map


living in the northern part of the Old World. In otherwords, Europe and Asia and northern Africa.

World Map

bilateral symmetry

having body symmetry such that the animal can be divided in one plane into two mirror-image halves. Animals with bilateral symmetry have dorsal and ventral sides, as well as anterior and posterior ends.


a wetland area rich in accumulated plant material and with acidic soils surrounding a body of open water. Bogs have a flora dominated by sedges, heaths, and sphagnum.


an animal that mainly eats meat

causes or carries domestic animal disease

either directly causes, or indirectly transmits, a disease to a domestic animal


mid-altitude coastal areas with mild, rainy winters and long, dry summers. Dominant plant types are dense, evergreen shrubs.


the nearshore aquatic habitats near a coast, or shoreline.


active at dawn and dusk

  1. active during the day, 2. lasting for one day.

animals which must use heat acquired from the environment and behavioral adaptations to regulate body temperature


union of egg and spermatozoan


forest biomes are dominated by trees, otherwise forest biomes can vary widely in amount of precipitation and seasonality.


mainly lives in water that is not salty.


An animal that eats mainly plants or parts of plants.

internal fertilization

fertilization takes place within the female's body


marshes are wetland areas often dominated by grasses and reeds.


having the capacity to move from one place to another.


This terrestrial biome includes summits of high mountains, either without vegetation or covered by low, tundra-like vegetation.

native range

the area in which the animal is naturally found, the region in which it is endemic.


active during the night


found in the oriental region of the world. In other words, India and southeast Asia.

World Map


reproduction in which eggs are released by the female; development of offspring occurs outside the mother's body.


the regions of the earth that surround the north and south poles, from the north pole to 60 degrees north and from the south pole to 60 degrees south.


rainforests, both temperate and tropical, are dominated by trees often forming a closed canopy with little light reaching the ground. Climbing plants are also abundant. There is plenty of moisture and rain, but may be somewhat seasonal.

scrub forest

scrub forests develop in areas that experience dry seasons.

seasonal breeding

breeding is confined to a particular season


reproduction that includes combining the genetic contribution of two individuals, a male and a female


associates with others of its species; forms social groups.


lives alone


a wetland area that may be permanently or intermittently covered in water, often dominated by woody vegetation.


this biome is characterized by large expanses of coniferous forest, there is an extended cold season and heavy snowfall.


that region of the Earth between 23.5 degrees North and 60 degrees North (between the Tropic of Cancer and the Arctic Circle) and between 23.5 degrees South and 60 degrees South (between the Tropic of Capricorn and the Antarctic Circle).


Living on the ground.


the region of the earth that surrounds the equator, from 23.5 degrees north to 23.5 degrees south.


A terrestrial biome found in very cold places -- either close to polar regions or high on mountains. Part of the soil stays frozen all year. Few kinds of plants grow here, and these are low mats or shrubs not trees. The growing season is short.

University of Michigan Museum of ZoologyNational Science Foundation

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. "Culicidae" (On-line), Animal Diversity Web. Accessed April 18, 2014 at

BioKIDS is sponsored in part by the Interagency Education Research Initiative. It is a partnership of the University of Michigan School of Education, University of Michigan Museum of Zoology, and the Detroit Public Schools. This material is based upon work supported by the National Science Foundation under Grant DRL-0628151.
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